Burner.



W. P. BOYLE.

uRNER l APPLICATION FILED JULY 17 191B.` f

1,256,480. 'patentedflveh 12, 1918..

WITNESS through inlet 15, and air through valve controlled inlet 16, preferably under pressure.

The inflow of oil may be regulated as de-- sired by the valve 27., As the oil leaves the burner through outlet 24, it is atomized by the stream of air leaving through the annular space 26, and it is particularly to be noted that the air is directed inwardly into the stream of oil to obtain a thorough mixture by reason of the convergent passage 26. Similarly, the gaseous fuel is directed into the stream of air and oil by the convergent outlet 2l so that bthe two fuels are thoroughly mixed with air. By closing ofil the supply of gas to outlet 19, the burner may be used for oil alone and, conversely, by closing valve 27, the burner may be used for gas alone.

The burner described finds another advantageous use in the enrichment of thin gaseous mixtures. Frequently,v the quality of gas supplied in certain localities and in certain plants does not possess the desired fuel value and is commonly known as thinl7 gas, Or in a given place the gas may vary in quality from time to time; at one time it may be rich and at another time poor in lfuel value. Such poor or thin gas may, However, be successfully used with 'type of burner by using a small quantity of oil, Which, when injected into the gas' will bring the final mixture up to the* required fuel value. The advantage oi' the burner is that by its use a desired Haine ot given heat value may be obtained at a given time and independent to a large degree of the main gas supply. The heat value of the {iame may also be changed from time to time as desired. The mixing of the fuel for the Haine nasa-eso passages will give a Wider range than heretofore in Which to adjust the flame for a given use Without interfering with the main supply oi' gas.

It is recognized that changes may be made in the structure herein described ior illustrative purposes Without departing from the scope of the invention which is dei-ined by the appended claim rather than by the foregoing description of one preferred form.

What l claim is- A fuel burner, comprising, a casing having axially alined openings, and an inlet rectangularly arranged with respect to said openings, a tube lixed'in and closing one ot said openings and extending. into the other thereot in spaced. eoncentrical relation, whereby an annular passage communicating with said inlet is formed, a member fixed to .the ycasing having a passage communicating lwith said tube, a pipe within the latter and xed to said member, a valve controlled passage in the latter communicating with said pipe, a cap on the casing, a cap on the tube, and a cap on the pipe, said caps arranged one Within another in spaced coneentrical relation and having conical surfaces Whereby annular converging outlets are formed, said annular passage, tube, and pipe adapted to be supplied with air, a gaseous and a liquid fuel, respectively, all constructed and arranged for a thorough atomization of the liquid fuel and an intimate mixing of the gaseous and 'atomized liquid fuel with the air.

VVlLLfiM P. BOYLE. 

